Which five letter word can be added at the end of below word to form a
valid word?

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I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Different lights make me strange by changing me into different sizes. What am I?

What does this Rebus Picture means ?

Three people enter a room and have a green or blue hat placed on their heads. They cannot see their own hat but can see the other hats.
The colour of each hat is purely random. They could all be green, blue, or any combination of green and blue.
They need to guess their own hat colour by writing it on a piece of paper, or they can write 'pass'.
They cannot communicate with each other in any way once the game starts. But they can have a strategy meeting before the game.
If at least one of them guesses correctly they win $10,000 each, but if anyone guesses incorrectly they all get nothing.
What is the best strategy?

What does below Rebus mean ?

esgg sgeg gegs gsge

What can you hold in your right hand, but never in your left hand?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

10+10 and 11+11 can give you the same answer.

Explain how?